Table of Contents

Wiring Diagram Overview
Overview
Volkswagen wiring diagrams are a graphic
representation of the actual vehicle wiring.
They are developed from the engineering
drawings that are used to produce the wiring
harness. A consistent set of symbols are
used to represent the actual components
and conductors.
Volkswagen electrical systems and wiring
diagrams follow the German DIN (Deutsche
Industrie Norm/Deutsches Institut für
Normung) standards. These standards are
guidelines for manufacturing in Germany,
similar to SAE (Society of Automotive
Engineers) in the United States.
Layout
The layout of wiring diagrams is common to
all Volkswagen vehicles. Called “Current
Track” wiring diagrams, they show the
power source at the top of the page and the
Ground points at the bottom. Situated vertically
between power and Ground are the
current tracks, which contain electrical components
and conductors.
This current track layout simplifies the wiring
diagram. Conductor symbols crossing where
they do not connect is kept to a minimum.
Refer to the example on page 3 for the basic
layout of the wiring diagram.
Central/relay panel
The central/relay panel is indicated in gray at
the top of the wiring diagram page. The central/relay
panel includes common power circuits,
such as battery power (30), ignition
switched power (15), load reduction (75/X),
and Ground (31).
2
Ground Connections
Ground connections are represented as a
line at the bottom of the wiring diagram
page, directly above the current track numbers.
All Ground connections, whether they
occur as a splice in a harness, or the final
Ground source, are numbered and identified
in the wiring diagram.
Conductors and components
Between the central/relay panel and the
vehicle ground at the bottom of the diagram
are located the component symbols and
conductors. Components are marked with a
component code listed in the legend.
Conductors are generally marked with wire
color and size.
Current tracks
Individual current tracks are identified numerically
along the base of the wiring diagram.
These numbers are used to find the continuation
of a conductor. Where the system or
circuit layout is complex, this continuation
may be on the same page, or on a different
page.
For example, the number 191 inside of the
small box on page 3 indicates that the wire
is continued on current track 191. Following
straight down on the diagram, we see that
this wire is on current track 5. If we were to
navigate to current track 191, we would see
the same color and size wire with a small
box containing the number 5.
Legend
Below the current track numbers you’ll find a
legend of the components (by component
code) found in the specific diagram. This will
often detail the location of a given component
or connection.